Enameling furnace



Apria 7, 1925.

.A. D. DAUCH ENAMELING FURNACE Filed Aug.- 27, 192s 5 Smeets-sheet' 14Apr7, 1925.

A. D. DAUCH ENAMELING FURNACE Filed Aug. 27, 1923 5 Sheets-Sheet 2 IIIHIHIIIIIHIIIIIIH` rml M;

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A. D. DAUCH ENAMELING FURNACE Filed Aug. 27, 1923 5 Sheets-Sheet 3 /NVENTO@ wif April 7, 1925.'

A. D. DAUCH ENAMELING FURNACE 15u/Elway? @im t QXL/A, /`/////////l MApril 7, 1925.

A. D. DAUCH ENfXMELING FURNACE Filed Aug. 27, 1923 v j N l 1CQC-GQBDDOCCCGDQIGU h-II/ .WJ t. 5.0 lo.. w ma U cdd DCCVCCCOQUQUDQ Us nlll n Y C CQCCCUDEDila-h E o o EL. cnc enncucccunnac u nu o H o o ccacaaeacccmhncacne uen o H a n cncccaanqauanaonehv o o :c: uucanencnnaniclmnu .l n a cu ccnnwcclccauzulzu und QCO CUQO-Dncnadqcu ULI' www PatentedApr. 7, 1925.

UNITED STATES 1,532,521 PATENT orifice.

ALAN D. DAUCH, F PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO GEORGE J. HAGANCOMPANY, 0F PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

ENAMELING' Farmacia Application led August 27, 1923. Serif? 55e. $9,443.

6 of the United States, have invented or dis'- covered certain new anduseful Improvements in Enameling Furnaces, of which improvements thefollowing is specification.I

The invention described herein relates to certain improvements infurnaces for burning enamel on the surfaces of metal articles and hasfor its object a construction of supporting racks permitting ot" theireasy and quick renewal,'and a construction-ot' rack support permittingof a. 4rapid heating ot' the articles. It is a further object of theinvention to provide for the simultaneous discharging and charging ofthe furnace.' The invention is hereinafterl more fully described andclaimed.

In the accompanying drawings forming a part of this specilicaton Fig. 1is a sectional elevation of a furnace embodying die improvements claimedherein; Fig. 2 is a 425 section plan view, the plane ot section beingindicated by the line II-IL Fig. l; Fig. 3 is a transverse section in aplane indicated by the line Ill-IITl Fig. 4; Fig. 4 is a detail viewshowing 1n elevation a section of a longitudinal beam and a rack mountedthereon; Fig. 5 is a to pla'n View of the rack supporting beam; IFig. 6is a similar view of a section of the rack; and Fig. 7 is a transversesection on a plane iudicated by the line VIL-VII, Fig. 4. Fig.

8 is -a sectional elevation of an enamelinr furnace. and mechanism forcharging and moving articles into and from such furnace; and Fig. 9 is atop plan View on au enlarged scale of the charging mechanism.

In the practice ot the invention the furnace is preferably provided withcharging and discharging openings at its ends and as it is preferredthat heat should be ap- A plied directly to upper andunder surfaces ofthe articles, the furnace is made of suitableheight, and the articlessupported as hereinafter described, approximately midway of the interiorheight of the fuinace.

10 Horizontal. members, or beams, 2, preferably formed of refractorymaterial, are arranged across the furnace and supported at their ends bythe sided-walls of the rurnace, and also by pref-elenco at. intermediatepoints by piers .:n-enners beams 2 are spaced distances apart and fromthe 'ends of the furnace dependent on the lengths of the sections 4 ofthe rack supports preferably formed of a refractory alloy. Thesesections are anchored at 'one end of the transverse beams by pins 5projecting into the latter, and'in order to maintain the sections inalinement, adjacent endsare interlocked in anysuitable manner. In theconstruction shown, one cud of each section is provided with `aws G forthe reception of the plain end o the next adjacent section.- As itisdesirable to employ a large number of these longitudinally arrangedsections and at the same time to provide spaces between adjacent linesofvsections to permit of the upward passage of heat between them,'thesections are made eompartively thin and provide lateral projections attheir lower edges 'and adjacent to the A:nds of the sections, adapted tobear on the upper surfaces of the beams. At one end these lateralprojections are formed by thejaws 6 and at the opposite end by ears 7.By reference to Figs. l, 2 and 5, it will be seen that the sections are.made by such lengths and so supported that adjacent ends will not abut,thus permitting of expansion of the sections.

As shown in Figs. l and l, the racks are formed of bars 9 provided onone side with. a plurality of pointed pins 10. The bars which arearranged on the supporting sections are. preferably a little shorterthan. the sections. Any snit-able means may be ernployed for holding thebars on the sections in Such manner as to permit of their easyreplacement. bv othrbars. A desirableA construe-tion to this endconsists in forming flanges 4 along the upper edges of the sections4 andcutting notches in the flanges for the. reception of lugs 1l so formedonthe bars 9 that a por-tion of the lugs will project down on one sideof the sect ions, while the others will project down the other side of100 ranged respectively at opposite ends of the 105 furnace as shown inFig.'8. Each of said mechanisms consists of a fork having a pluralityVot prongs or fingers i2 spacedv such. distances apart that when a, forkis These transverse pushed into the furnace the fingers will be in linewith spaces between the rowsof pins of the rack inthe furnace. Thefingers are made of lengths substantially equal to thelength of thefurnace and are so supported that they may be moved into and out of the`furnace and also raised and lowered. In the construction shown hereinfor imparting the desired movements to the fork, the prongs 12 aresecured at their inner ends to a frame consisting of vertical bars 13and brackets .11i secured to the bars which have their respective endspivotally connected to a pair of levers 15 and 16 fulcrumed at17 on theposts or standards 18 secured to the frame of the machine. The 'forksare supportedj in horizontal normal position by abutments 19 secured tothe vertical bars 13 .4f The upper ends of the vertical bars 125axjeiadjustably connected to the upper' levers by "turn buckles 20. Byadjusting the turnbl'okles the normal position of the fork can bevarie-d. A comiterbalancing weight. 2l is secured to the rear ends ofthe levers.

The members of the pairs of levers are connected by cross bars22and1these cross bars are connected to the innerend -of an operatinglever 23, which is preferably provided with a. locking device adapted toengage teeth on a. sector 24, whereby the fork may be held in roperpositionv While being 'moved into andJ out of the furnace. The chargingmechanism is .mounted on wheels 25 movable along rails 26 in alinementwith the furnace. The back and forth movement of vthe mechanism ispreferably effected lby of the charging mec anisms which is then then`withdrawn and another charge of ma terial placed thereon. As soon asthearticles have been properly- 'heated the fork at the other end is runinto the furnace, the pronfrs passing below the articles' resting on thepins. The fork is then raised to lift the articles away from the pinsand the fork withdrawn. .It will be seen that the opera-- tion'abovedescribed is similar to the operation of what is tei'incd'a continuousheating furnace, the articles being moved at all times in the samedirection.

I claim herein as my invention:

l. An enameling furnace h. ving in combination therewith a plurality ofbeams or members arranged in spaced relation within the furnace andrackslconsisting of a plusections and racks provided with pins forAsupporting articles to be treated detachably supported by the racksupports.

3. An enamelingI furnace having in com'- bination therewith a" pluralityof spaced beams or members arranged intermediate the ff* helght of theheating chamber, racks pro-"- vided with pins for supporting articlest'o be treat-ed arranged in 'spaced relation on said beams and meanswhereby vheat is applied to the upper and undersides of articlessupported by the racks.

4;. An enameling furnace' having in conibination therewith a'phu'alityof spaced vbeams or members-arranged transversely of and in a planeintermediate the height of the chamber of the furnace, rack supportsarranged-longitudinally of the chamber and consisting of la plurality oflongitudinal sections and racks provided with pins for supporting thearticles to'be treated detachably :secured to the rack supportsandlmeans for applying heat to the upper and' underside of articlessupported by the racks.

5. An enameling furnace having in combination therewith a. plurality of-spaccd beams or members arranged transversely of and in a planeintermediate the height-of .f the chamber on -the furnace, rack supportsarranged longitudinally of the chamber and consisting of'a pluralitycf'longitudinal sections, and racks consisting of a plurality oflongitudinal sections and detachably secured to the rack supports.

6. An en'amelng furnace having in combination therewith rack supports4extending longitudinally of the furnace and racks pro-i vided with pinsconsisting of a. plurality of sections'and d'etnchablysecured tothe racksupports.

" 7. An enameling furnace havinglin com- ,bination therewith beams ormembers arranged transversely of the `furnace and'in spaced relation oneto theothcig, rack-supports consisting of a plurality ofsectionsextending longitudinallyof thefffurnace and supported by saidbea1ns,each section being provided with means-forf-detachably anchoringsuchsection to' a transverse beampthc 'ends of such section'sbeingadapted to interlock so as tf'i'mainain the sections in alinement, a.rack provided with pins detachably secured to such supports.

8. An enameling furnace having in combination therewith beams or membersarranged ltransversely bf the furnace and in IIT-ii beams or members theupper and under si spaced relation one to the other, rack-supportsconsisting of a plurality of Sections extending longitudinally of thefurnace and sul'iportcd by said beams, each section being 5 providedwith means for detachably anchoring sneh section to a transverse beam,the ends of such sections being adapted to interlock se as to maintainthe sections in alinenient, and racks'consisting of a plurality of 1usections, each provided with pinsand with means for detachably engagingthe rack support-ing sections.

9. An enamelinfr furnace having in combination therewith a plurality ofspaced arranged intermediate the height of the chamber, members carryinga plurality of pins supported. bythe beams arranged in spaced relationon the beams and means whereby heat is applied to es ofarticlescsupported by the pins. 10. An enameling furnacehaviug incombination therewith a plurality of spaced beams or members arrangedtransversely of and in a plane intermediate the height of the chamber.in the furnace, supporting members consisting of a pluralit ofsecranged transversely of the furnace and in-A spaced relatin one to theother, supporting members' consisting of a plurality of sectionsextending longitudinally of the furnace and supported bv said beams,each sec- 'tion being provided with means for detachably anchoring suclasection to a transverse beam, the ends of the sections being providedwith interlocking elements adapted to per- `mit of the independentexpansion and contraction of the sections'.

In testimony whereof, I have hereunto set my hand.

` ALAN D. DAUCH.

